Reliability
There are claims that early models had unstable tuning, mainly due to their panel slider encoding resolution and main control voltage generation. However, this may be limited to the first 500 JP-8s that were manufactured. Beginning with serial number 171700, the 12-bit DAC was upgraded to a 14-bit DAC. This increased the resolution of the controls but had little to no effect on the overall sound quality. The soldered-in battery typically lasts ten years or more, ranking these boards among the lowest-maintenance of their generation.
Read more about this topic: Roland Jupiter-8